2016 Patellofemoral pain consensus statement from the 4th International Patellofemoral Pain Research Retreat, Manchester. Part 1: Terminology, definitions, clinical examination, natural history, patellofemoral osteoarthritis and patient-reported outcome measures. Issue 14 (24th June 2016) - Crossley, Kay M; Stefanik, Joshua J; Selfe, James; Collins, Natalie J; Davis, Irene S; Powers, Christopher M; McConnell, Jenny; Vicenzino, Bill; Bazett-Jones, David M; Esculier, Jean-Francois; Morrissey, Dylan; Callaghan, Michael J